EM Spectrum
Where does electromagnetic radiation come from?
The sun
What type of wave is sound, and how does it travel through different materials?
Transverse; it travels by bouncing off of atoms in the medium.
What happens to light when it is reflected off a surface?
The light is REFLECTED back.
What is sound made of?
How does the Sun transfer energy to the Earth?
Radiation
What is the only form of electromagnetic radiation that we can see?
Visible Light
What is wavelength?
The distance between two crests
Define refraction and provide an example.
Refraction is the bending of a wave, like light or sound, as it passes from one medium to another with a different density.
ex: Pencil in water
Which medium allows sound to travel the fastest, and why?
Solids; more atoms to bounce off of.
What is radiation?
energy that moves from one place to another in a form that can be described as waves or particles
Which type of electromagnetic radiation has the highest frequency, and what is a common use for it?
Gamma Rays; sterilization, cancer treatment, ect.
What is frequency?
The amount of waves that pass through a point in a set period of time.
How does light behave when it encounters a prism?
It creates a rainbow
How does temperature affect the speed of sound in air?
As temperature increases, the speed of sound in air also increases
Explain why higher frequency waves carry more energy.
because they have more waves per second transferring more energy in that time period
Which type of electromagnetic radiation has the lowest frequency, and what is a common use for it?
Radio waves; radio, tv.
How do you measure amplitude?
Measure from the equilibrium to the crest or trough.
Describe an example of light absorption.
the leaves of green plants contain a pigment called chlorophyll, which absorbs the blue and red colors of the spectrum and reflects the green - leaves therefore appear green
What is the difference between pitch and volume in sound waves?
"pitch" refers to the perceived highness or lowness of a sound, which is determined by its frequency, while "volume" refers to how loud or soft a sound is, which is determined by its amplitude
How does energy transfer differ in solids, liquids, and gases?
The particles in solids are tightly packed and can only vibrate. The particles in liquids also vibrate but are able to move around by rolling over each other and sliding around. In gases, the particles move freely with rapid, random motion.
What is the relationship between frequency and wavelength in the electromagnetic spectrum?
Inverse Relationship (frequency increases, wavelength decreases)
Which type of wave travels fastest through solids?
Sound waves
What is the acronym for remembering the waves of visible light?
ROYGBIV
Would an underwater whale song or a song playing in your car travel faster? Justify your response.
In the water, because sound travels faster in liquid than gas.
Give an example of how energy from the Sun is used in everyday life.
Energy from the sun is transformed into electricity via solar panels.